Author: dim
Date: Tue Sep 18 20:46:55 2018
New Revision: 338756
URL: https://svnweb.freebsd.org/changeset/base/338756
Log:
MFC r309748 (by glebius):
Treat R_X86_64_PLT32 relocs as R_X86_64_PC32.
If we load a binary that is designed to be a library, it produces
relocatable code via assembler directives in the assembly itself
(rather than compiler options). This emits R_X86_64_PLT32 relocations,
which are not handled by the kernel linker.
Submitted by: gallatin
Reviewed by: kib
PR: 231451
Modified:
stable/8/sys/amd64/amd64/elf_machdep.c
Directory Properties:
stable/8/ (props changed)
stable/8/sys/ (props changed)
stable/8/sys/amd64/ (props changed)
Changes in other areas also in this revision:
Modified:
stable/10/sys/amd64/amd64/elf_machdep.c
stable/11/sys/amd64/amd64/elf_machdep.c
stable/9/sys/amd64/amd64/elf_machdep.c
Directory Properties:
stable/10/ (props changed)
stable/11/ (props changed)
stable/9/ (props changed)
stable/9/sys/ (props changed)
Modified: stable/8/sys/amd64/amd64/elf_machdep.c
==============================================================================
--- stable/8/sys/amd64/amd64/elf_machdep.c Tue Sep 18 17:51:45 2018
(r338755)
+++ stable/8/sys/amd64/amd64/elf_machdep.c Tue Sep 18 20:46:55 2018
(r338756)
@@ -161,6 +161,7 @@ elf_reloc_internal(linker_file_t lf, Elf_Addr relocbas
switch (rtype) {
case R_X86_64_PC32:
case R_X86_64_32S:
+ case R_X86_64_PLT32:
addend = *(Elf32_Addr *)where;
break;
default:
@@ -194,6 +195,8 @@ elf_reloc_internal(linker_file_t lf, Elf_Addr relocbas
break;
case R_X86_64_PC32: /* S + A - P */
+ case R_X86_64_PLT32: /* L + A - P, L is PLT location for
+ the symbol, which we treat as S */
addr = lookup(lf, symidx, 1);
where32 = (Elf32_Addr *)where;
val32 = (Elf32_Addr)(addr + addend - (Elf_Addr)where);
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